Quick Explanation
Denial code CO-186 indicates that the claim was denied because the patient was not eligible for insurance benefits on the specified date of service. This typically occurs when a patient's policy has been terminated, has not yet become active, or does not cover the rendered services under their current plan.
Common Causes for CO-186
Denials with code CO-186 typically happen for the following specific reasons:
- The patient's coverage was terminated prior to the date of service.
- The patient's policy was not yet active on the date of service.
- The patient changed insurance plans and the provider billed the outdated coverage on file.
- The specific services rendered are excluded from the patient's current benefit plan.
How to Prevent CO-186 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Perform robust real-time eligibility verification at the time of scheduling and prior to rendering services.
- Verify and scan the patient's current insurance card at every encounter to catch plan updates.
- Establish automated alerts in the EHR/billing system for discrepancies in coverage dates.
- Implement pre-service benefit checking for high-cost or specialty procedures to ensure coverage.
Appeal Letter Template for CO-186
If you believe this claim was denied incorrectly, you can use the following template to submit an appeal.
[Your Practice Header]
[Date]
[Payer Name]
[Appeals Department Address]
RE: Appeal for Claim [Claim Number]
Patient: [Patient Name]
ID: [Patient ID]
Date of Service: [Date]
Denial Code: CO-186 - Payment denied due to eligibility
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code CO-186: "Payment denied due to eligibility".
We are writing to appeal the denial of this claim under code CO-186 (Payment denied due to eligibility) for the service rendered on [Date of Service]. Our records and attached documentation indicate that the patient's eligibility was verified and confirmed active under policy [Policy Number] at the time of service, aligned with CMS guidelines regarding administrative reliance on payer verification systems. We have attached the clearinghouse eligibility response screen containing the active confirmation transaction number and timestamp. We request that this claim be reprocessed and reimbursement be issued as verified.
Attached please find:
1. A copy of the original claim.
2. The relevant medical records supporting the service.
3. [Any other supporting documents].
We respectfully request that you reprocess this claim for payment.
Sincerely,
[Your Name]
[Title]
[Practice Name]
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